Fault Location Method single ended distributed parameter line amplitude characteristic measuring the impedance single-phase ground

The present invention discloses a distributed parameter-based amplitude characteristic impedance of the line single-ended single-phase ground fault distance measurement method. The present invention employs a distributed parameter model, selecting from the initial value of the fault lx, step length Δl incremented sequentially calculates the magnitude of the measured impedance distribution parameter z of each point to the point of the single-phase ground fault on transmission lines (lx) until the transmission line full-length, select the distribution parameter measuring impedance magnitude z (lx) installed at the distance from a protection transmission line corresponding to the minimum distance to the fault. The method of the present invention using a single-phase ground fault point corresponding to the amplitude distribution parameters measured impedance reaches a minimum distance principle single-ended transmission line of the single-phase ground fault, the influence of the transition resistance and the load current of the single-ended fault location accuracy, especially the method of the present invention can accurately measure the distance to fault when a single-phase transmission line high resistance ground faults with high fault location accuracy.